weeg i sia wrehe lirys currently stepping up its use of airpower in an fort t deft t rebel >> opposition forces s a let pplha bnild an air strike near the turkish border. anwhile, aideo emerg of what appears te poti fite executing government soldiers. >> the un says atf the vide is autnticated, the action would constitute a war crime. >> as their prisoners cower in terror, rebels celebrate. this video is said to of been coed in northwestern syria. governmentorces and rebels have been fighti there for weeks. on thursy, rebstoed several army checkpoints. they appear to haveapred these government soldiers. in the video, rebels yell, "you are assad's dogs" at their captives, and then they prayed. after tt, the fired rnd afte round, killing at least 10 of those prisoners. the united nations is trying to verify the video and says the killings probably constituted a war crime and those responsible should be punished. >> it looks very likely that this is a war crime, another one. unfortunately, this uld be the latest in a stream of documented executions byppitn wl as government forces and its af